Remember that taxonomic classification has eight main levels:
Domain
Kingdom
Phylum
Class
Order
Family
Species
All starfish belong to the domain Eukarya, the kingdom Animalia, the phylum Echionodermata, and the class Asteroidea. After this they diverge into different orders, families, and species. There are around 2000 species of starfish overall, each with a different two-part scientific name.
Asterias forbesii
The scientific name of a spiny starfish is "Marthasterias glacialis."
The scientific name of a cushion starfish is Culcita novaeguineae.
Echinoderm is the scientific name for spiny-skinned animals. Spiny-skinned animals include sea urchins, sand dollars, brittle stars, starfish, and sea cucumbers.
The scientific name for squids is Decapodiformes.
Asterias forbesii
The scientific name for a starfish in general is 'Asterias Forbesii'
The scientific name of a spiny starfish is "Marthasterias glacialis."
It is called toilet water.
The scientific name of a cushion starfish is Culcita novaeguineae.
It is the scientific name of Starfish.
Asterozoa
The scientific name is Acanthaster planci.
Asteroidea
Pteraster tesselatus
Asterias Forbesii
Asterias rubens